CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 07,2006, Pages 433-435, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 07,2006, Pages 436-439, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 07,2006, Pages 440-444, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 07,2006, Pages 445-448, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 07,2006, Pages 449-451, Dol: